From 0e2584fc9f367c2d3cd3e0ce578fb81b0e74b6ce Mon Sep 17 00:00:00 2001
From: RipleyTom <RipleyTom@users.noreply.github.com>
Date: Sun, 25 Jan 2026 07:10:50 +0100
Subject: [PATCH] sceNpBasicLimitedSendMessage

---
 rpcs3/Emu/Cell/Modules/sceNp.cpp | 65 ++++++++++++++++++++++++++++++--
 rpcs3/Emu/Cell/PPUModule.cpp     |  1 +
 rpcs3/Emu/Cell/PPUModule.h       |  1 +
 3 files changed, 64 insertions(+), 3 deletions(-)

diff --git a/rpcs3/Emu/Cell/Modules/sceNp.cpp b/rpcs3/Emu/Cell/Modules/sceNp.cpp
index 2b49309a9b..ee9c308265 100644
--- a/rpcs3/Emu/Cell/Modules/sceNp.cpp
+++ b/rpcs3/Emu/Cell/Modules/sceNp.cpp
@@ -1118,10 +1118,35 @@ error_code sceNpBasicSetPresenceDetails2(vm::cptr<SceNpBasicPresenceDetails2> pr
 	return CELL_OK;
 }
 
-error_code sceNpBasicSendMessage(vm::cptr<SceNpId> to, vm::cptr<void> data, u32 size)
-{
-	sceNp.warning("sceNpBasicSendMessage(to=*0x%x, data=*0x%x, size=%d)", to, data, size);
+u64 sys_time_get_system_time();
 
+error_code acquire_time_slot(u64* time_array, usz array_size, u64 slot_duration)
+{
+	static shared_mutex mutex;
+	std::lock_guard lock(mutex);
+
+	const u64 current_time = sys_time_get_system_time();
+
+	for (usz index = 0; index < array_size; index++)
+	{
+		if (time_array[index] == 0)
+		{
+			time_array[index] = current_time;
+			return CELL_OK;
+		}
+
+		if (current_time > (time_array[index] + slot_duration))
+		{
+			time_array[index] = current_time;
+			return CELL_OK;
+		}
+	}
+
+	return SCE_NP_BASIC_ERROR_BUSY;
+}
+
+error_code _sceNpBasicSendMessage(vm::cptr<SceNpId> to, vm::cptr<void> data, u32 size, bool rate_limited)
+{
 	auto& nph = g_fxo->get<named_thread<np::np_handler>>();
 
 	if (!nph.is_NP_init)
@@ -1144,6 +1169,22 @@ error_code sceNpBasicSendMessage(vm::cptr<SceNpId> to, vm::cptr<void> data, u32
 		return SCE_NP_BASIC_ERROR_EXCEEDS_MAX;
 	}
 
+	if (rate_limited)
+	{
+		struct sceNpBasicSendMessage_time_slots
+		{
+			sceNpBasicSendMessage_time_slots(sceNpBasicSendMessage_time_slots&&) = delete;
+			std::array<u64, 20> data{};
+		};
+
+		auto& time_slots = g_fxo->get<sceNpBasicSendMessage_time_slots>();
+
+		if (auto error = acquire_time_slot(time_slots.data.data(), time_slots.data.size(), 60000000); error != CELL_OK)
+		{
+			return error;
+		}
+	}
+
 	if (nph.get_psn_status() != SCE_NP_MANAGER_STATUS_ONLINE)
 	{
 		return not_an_error(SCE_NP_BASIC_ERROR_NOT_CONNECTED);
@@ -1164,6 +1205,19 @@ error_code sceNpBasicSendMessage(vm::cptr<SceNpId> to, vm::cptr<void> data, u32
 	return CELL_OK;
 }
 
+error_code sceNpBasicSendMessage(vm::cptr<SceNpId> to, vm::cptr<void> data, u32 size)
+{
+	sceNp.warning("sceNpBasicSendMessage(to=*0x%x, data=*0x%x, size=%d)", to, data, size);
+	return _sceNpBasicSendMessage(to, data, size, false);
+}
+
+// This function is sceNpBasicSendMessage + a rate limiter that will return SCE_NP_BASIC_ERROR_BUSY if it too many messages have been sent
+error_code sceNpBasicLimited_0xEB42E2E6(vm::cptr<SceNpId> to, vm::cptr<void> data, u32 size)
+{
+	sceNp.warning("sceNpBasicLimited_0xEB42E2E6(to=*0x%x, data=*0x%x, size=%d)", to, data, size);
+	return _sceNpBasicSendMessage(to, data, size, true);
+}
+
 error_code sceNpBasicSendMessageGui(ppu_thread& ppu, vm::cptr<SceNpBasicMessageDetails> msg, sys_memory_container_t containerId)
 {
 	sceNp.warning("sceNpBasicSendMessageGui(msg=*0x%x, containerId=%d)", msg, containerId);
@@ -7289,6 +7343,11 @@ s32 _Z32_sce_np_sysutil_cxml_prepare_docPN16sysutil_cxmlutil11FixedMemoryERN4cxm
 	return CELL_OK;
 }
 
+DECLARE(ppu_module_manager::sceNpBasicLimited)
+("sceNpBasicLimited", []() {
+	ppu_module_manager::register_static_function<&sceNpBasicLimited_0xEB42E2E6>("sceNpBasicLimited", ppu_select_name("sceNpBasicLimited", "sceNpBasicLimited_0xEB42E2E6"), BIND_FUNC_WITH_BLR(sceNpBasicLimited_0xEB42E2E6, "sceNpBasicLimited"), 0xEB42E2E6);
+});
+
 DECLARE(ppu_module_manager::sceNp)
 ("sceNp", []() {
 	REG_FUNC(sceNp, sceNpInit);
diff --git a/rpcs3/Emu/Cell/PPUModule.cpp b/rpcs3/Emu/Cell/PPUModule.cpp
index 65ab0fe18d..b298539519 100644
--- a/rpcs3/Emu/Cell/PPUModule.cpp
+++ b/rpcs3/Emu/Cell/PPUModule.cpp
@@ -314,6 +314,7 @@ static void ppu_initialize_modules(ppu_linkage_info* link, utils::serial* ar = n
 		&ppu_module_manager::libsnd3,
 		&ppu_module_manager::libsynth2,
 		&ppu_module_manager::sceNp,
+		&ppu_module_manager::sceNpBasicLimited,
 		&ppu_module_manager::sceNp2,
 		&ppu_module_manager::sceNpClans,
 		&ppu_module_manager::sceNpCommerce2,
diff --git a/rpcs3/Emu/Cell/PPUModule.h b/rpcs3/Emu/Cell/PPUModule.h
index fdcd736f38..6171a4faa1 100644
--- a/rpcs3/Emu/Cell/PPUModule.h
+++ b/rpcs3/Emu/Cell/PPUModule.h
@@ -283,6 +283,7 @@ public:
 	static const ppu_static_module libsnd3;
 	static const ppu_static_module libsynth2;
 	static const ppu_static_module sceNp;
+	static const ppu_static_module sceNpBasicLimited;
 	static const ppu_static_module sceNp2;
 	static const ppu_static_module sceNpClans;
 	static const ppu_static_module sceNpCommerce2;